G 3500 1 Ton Van V8-350 5.7L VIN K TBI (1987)
Valve Body: All Technical Service Bulletins
A/T - New Auxiliary Accumulator Valve Body/Cover
GMC NUMBER:
87-T-47
GROUP:
7A - Automatic Transmission
DATE:
April, 1987
CORPORATE NUMBER:777120R
SUBJECT:
NEW AUXILIARY ACCUMULATOR VALVE BODY AND COVER
MODELS:
1987 LIGHT DUTY MODELS WITH THM 700-R4 AUTOMATIC TRANSMISSIONS
Figure 1
BULLETIN COVERS: (Figure No. 1)
A new auxiliary accumulator valve body (377) and a new cover (371) went into production to prevent the accumulator piston pin from working its way
out of the auxiliary valve body. If the accumulator piston pin comes out of either end of the auxiliary valve body the following conditions could occur.
1.
Loss of DRIVE
2.
Slipping in DRIVE
3.
Burned forward and overrun clutches
